Door operating mechanism



March 28, Q W HORTON DOOR OPERATING MEGHANISM III H rlll/ ILIIIIHIILIII/ Il WITNESS:

March 28, 1933.

c. uw. HoRToN DOOR OPERATING MECHANISM 3 Sheets-Sheet 2 Filed Jan. 28, 1931 March 28, 1933 c, w HORTON DOOR OPERATING MECHANISM Filed Jan. 25, 1951 3 Sheets-Sheet 3 Patented Mar. 28, 1933 i UNITED STATES PATENT ori-loriy Application filed January 26, 1931. Serial No. 511,402.

This invention relates to door operating Figure 8 is a section on the line 8-8 of mechanisms for opening and closing doors Figure 2. of various types and may be advantageously Figure 9 is a diagram of the circuits. used for opening and closing the doors of ele- Figure l() is a fragmentary elevation partvntoI-e An object of the invention is t proly in section illustrating the clutch for throw- 55 vide electrically operated means which may ing out the door operating mechanism. i berendered active to move the door from an Referring to the drawings in detail Whereopen to a closed position and vice versa, and in like characters of reference denote correto automatically interrupt operation of the Spondllg part/S, Jthe reference character l0 mechanism at the limit of movement of the indicates a portion of the door of an elevatorL oo door in either direction, or car which maybe of any desired type and Another object of the' invention is the prowhich is shown as of the collapsible or foldvision of automatically operated means for able type hung upOIl Curved rollers 1l which normally holding the door 'against movement. operate over a track or rail 12 carried by the 1 until a circuit is closed through the electric elevator (not ShoWI1) The fGfeIeIlCe Chef-Y 65 drive of the door mechanism, and thus proenter 13 1`eP'eSentS e Portion of one of tno vide for the safety of persons entering or doofe of the elevator Snefttne from@ o1" lamb leaving the elevator, of which is indicated at 14, it being of course Another object of the invention is the prounderstood tuut the Shaft Win be Provided vision of means actuated by the elevator door non a door for eeon door o1' lending- 7o operating mechanism for operating and con- Adapted to be mounted upon the elevator trolling the operation of the elevator shaft by any Sutublo means is a housing 15 EX" doorn tending through this housing isa Worm shaft Another object of the invention is the prolos upon Wnioh iS mounted e Worm 17- This vision of means of the above character which Shaft operates in enti-friction bearings 18 are simple and reliable in construction and and extends through Stuuing boxes 19 So that operation may be manufactured and applied the housing may be filled with oil for proper es fnetonv equipmenta or may be Separately lubrication and silent operation ofthe parts. u sold and fitted to various types of doors Where Loosoly mounted upon the snafu 1.o is u tomatc Operation is desired' sprocket 20 which 1s adapted to frlctionally With the above and other objects in view, engage a Collar 2l Whlch is fast on the .Shaft the invention further includes the following 16. The Sprocket 20 1S drlven by a (iham 22 novel features and details of construction, to Whlch may be Operated by .an eleotrlo motor be hereinafter more fully desoribed,illustrat M' Thls Sprocket 1S provlded Wlth a cone ed in the accom an -n d K face 23 for engagement by the conical end of ed om; in the apendedlgg and polnt a clutch memberD 24 Which 1s spllned to the In the drawngs, shaft 16 as shown at 25. A spring 26 nor- Figure l is a fragmentary elevation inus mally urges the clutch member 24 into friceo trating the invention, a portion of the eleva- )clonal engagement Wlth the Cone face 23 and ,n the tension of this spring may be regulated tor shaft door carried means being shown by means of a ,mt 27 molmted upon the end in section.

of the shaft 16. A frictional drive 1s thus ltgure 2 1S a' fragmentarytop Plon VleW- provided for the shaft 16, so that in the event U p lgufee 3: 4 und 5 ere Seotlonol VleWS teken of accident or failure of any of the part-s of feeldeotlvely on une hnes 3 3 4**4 and 5h5 the mechanism to be described, a slippage of Figure 2. Will be provided between the sprocket 20 and Figure 6 1s a section taken substantially the shaft, Y l Aon the line 6-6 of Flgure 1. Extending from the housing 15 are upper 0 Figure 7 is a section taken substantially andflower guide bars 28 and 29 respectively, `on the line 7 7 of F lgure 2. the remote ends of these bars being mounted n longitudinal movement within the sleeve and in a housing 30 which is also adapted to be carried by the elevator. These guide bars have mounted thereon a carriage 31, which as shown in Figure 4 of the drawings, is bifurcated to engage over a guiderail 32. Extending downwardly from the carriage 31 are spaced arms 33 which are bolted or otherwise secured to the elevator door 10 as shown at 34. By this means, when the carriage is moved longitudinally of the guide rods, the elevato-r door 10 will be likewise moved from a closed to an open position, or vice versa, depending upon the direction of movement of the carriage. y

In order to move the carriage there is providedfa sprocket chain 35.. This chain .passes around a sprocket 36 which is mounted upon a short lshaft 37 which is in turn mounted in anti-friction bearings 38 carried by the housing- 15. A collar 39 is fast upon the shaft and this collar is providedzin its outer face with recesses 40, while teeth 41 which extend from a collar41a attached to the sprocket 36 engage vwithin these recesses, and as the collar y39 is fast upon the shaft 37, rotation of the latter'will rotatethe sprocket. Thechain 35 also passes around a sprocket 42 which is mounted upon a short shaft 43 provided inthe' housing 30, and as vthis chain engages of the shaft 37 Willmove the carriage longinection between the shaft 16 andthe shaft 37 is effected through the medium of the worm 17 and a worm wheel 45 mounted uponl the .shaft 37. y vThe fcollar 39 is formed upon one end of a sleeve 39a., to which Iis keyed the worm wheel i 45, the sleeve being free to rotate upon the shaft A37. The shaft 37 is also capable of the collar 41a is keyed tothe shaft as shown at' 37a. The sleeve 39a is provided internally with spaced annular grooves a and Z9, as shown 1n Figure 5 of the drawings, and these grooves are adapted to receive a spring pressedball c which is movable in Va diametrically disf posed recess provided in the shaft 37 YVhenthe parts Aare in the position shown 1n Figure .5 of the drawings, the drive will be from the worm gearing, through the sleeve, the collars 39 and 41a, and the sprocket chain 35; In the event of trouble with'the operat- 'ing mechanism, the collar 41al may be moved 5 axially by pulling outwardly onthe same .until `the teeth41are disengaged from withinthe recesses 40, whereupon no rotation of `the sprocket 36 will occur. In thisposition the ball c will be within the recess I).

Supported by the housing 15 is a Vswitch S, Awhile supported by the housingv 30is a lswitch S. Each of these switches includes spaced' contacts 46 which Vare adapted to be engaged byfcontacts 47 47 which are pivotallyinount- 65- ed as. at 48. Anoperating arm 49.extends teeth44 carried by the carriage 31, rotation Y from each of the contacts 47 47 and acts to normally hold these contacts in position to bridge the contacts 46. vThe contacts 46 of the switch S are electrically connected to the motor M by means of a conductor 50 which is tapped on to a conductor 51, while the contact 47 of this switch is connected by a conductor 52 with one post 53 of a switch 54. The contact 47 of the switch S is connected by a conductor 55 with another terminal-56 ofthe switch'54 while a conductor 57 leads from the other contact 46 to the motor vrthrough a conductor 58.

The contacts 46 of theswitch Sare connected to the motor M through conductors 59 and60, while the. contacts 47 and 47 of the switch S are connected to contacts 61 and 62 respectively by conductors 63 and 64.

In order to operate the switches S and S',

ofthe arm .65, while the arm 49 of the switch S `is arranged in the path of the arm 66 so that when the carriage reaches its limit of movement in one direction,l the arm 65 will open the switch S and when theY carriage reaches its limit of movement in an opposite direction, the ,arm 66 will open the switch S. Rigid upony the shaft 16fis a ybrake wheel 67 having a grooved periphery 68 and operating within this periphery are .arcuate friction elements 69 which .are carried by brake rshoes 70. These shoes vare pi-votally mounted as at 71 betweenthe upstanding plates 72 of a .switch stand 73, and eXt-ending'from these shoes are arms 74 to. which are pivotally mounted as at 75, the outer ends of plungers 76. These plungersentend into the opposite ends of a magnetic -coil 77 whichV when energized, will draw -the plungers inward Vand move the shoes relatively outward upon the pivots 71. The upper ends of .the shoes carry apertured`lugs7 8 through which passes arod 79, and springs 80 mounted uponl this rod act to yieldinfrly force the friction elements 69 into engagement within the grooved periphery of the wheel 67- The coil 77 is .bridged across .the conductors'59 and 60, by means of conductors 81 and 82.

Current for the operation of the motor may be supplied from a suitable source, for example, the line wires 83 and 84. These line wires are connected to suitable contacts 8,5, while contacts 86 spaced therefrom are connected with the switch 54 by means of conductorsr87 and 88. The contacts '85 and 86 are 'stationary and are adapted to be bridged by movable contacts'85a operated by means of a magnetic coil 86a connected in an auxiliary circuit which includes conductorsV 865 'and 860.

connected to one of the contacts 86d of a switch W, `the latter. including a pivotally mounted arm 86el whichfcarries a vContact 86f The conductor 860 isV i to which is attached a conductor 86g. The conductors 865 and 86g may be connected in any suitable manner with a source of current. They arm 86e also carries a contact y86k which is adapted to engage a stationary contact 86,fboth of which are connected in circuit with the elevator operating motor M.

By reference to Figure 9 it will be seen that when the switch W is positioned to close the circuit through the motor M, the circuit through the coil 86a will be open and consequently the circuit to the door motor M cannot be closed. Conversely, when the contacts 85-86 and 85a are engaged, a circuit may be completed through the motor M, while the switch W will be arranged to prevent closing a circuit through the motor M. As thus far described, assuming that the elevator door is closed, the coil 77 will be deenergized, so that the springs will cause the friction elements of the brake shoes to tightly engage the brake wheel 67 and preventoperation of the parts until the coil 77 is energized. However, -this coil cannot be energized until the contacts and 86 are bridged. As the-contacts 85 and 86 are positioned at each of the elevator landings, no current is supplied to the motor between these landings. As soon as the elevator reaches a landing, the contacts 85 and 86 are in position to be engaged by the contacts 85a, but the door cannot be opened until the switch 54 is closed and switch W operated through the usual elevator controller to open the circuit to the motor M. The elevator door being closed, the arm 66 of the carriage will engage the arm 49 of the switch S', so as to open this switch, the switch S being closed. By throwing the switch 54 so as' to engage the contacts 53 and 56, current will flow from the switch 54 through the conductor 55, the contact 47', its contact 46, the conductor 57, the conductor 58, `the'motoi1 M, the conductor A51, the conductor 50, the other contact46,

the contact 47 through the conductor 52 back to the Contact 53 of the switch 54. In addition, current will iow through the coil 77 so as to energize the latter and release the shaft 16. Operation of the motor will operate the chain 35 so as to move the carriage 44 away from the switch S, and move the door 10 to an open position. As soonas the arm 65 reaches the arm 49 of the switch S, this switch will be open to interrupt flow of current through the motor and through the coils 77, so that operation of the motor will stop and the brake shoes will be applied.

- When it is desired to close the door, the

switch 54 is operated to engage the contacts` 61 and 62, so that current will flow through the conductor 64, the contact 47 of the switch S, its contact 46, the conductor 59, the conductor 51, the motor M, the conductor 58, the conductor 60, the other Contact 46, the contact 47 and back to the switch through the conductor 63. The current will thus travel through the motor invan opposite direction so that the direction of the motor will be reversed to reverse the direction of movement of the door. As soon as the switch 54 is closed, the coil 77 will be again energized to release the wheel 67.

In order to also control the operation of the shaft doors 13, each of these'doors has extending therefrom a bracket 89. Pivotally mounted upon this bracket as at is a toothed latch 91, the teeth of which are adapted to engage a keeper plate 92 carried by the frame or jamb 14. A spring 93 acts to yieldingly hold this latch in engaged position.

Pivotally mounted upon the carriage 31 as shown at'94 is'anarm 95, and one end of this arm is formed with spaced shoulders 96 and 97, the latter being relatively long. These shoulders are spaced to receive between them the bracket 89 and an arm 98 which is rigid withthe latch 91 and to permit limited independent movement of the arm 89 and arm 90 with respect to the shoulders 96 and 97. The arm 95 has its lower end yieldingly forced outward. by means of a spring 99, and the upper end of this arm carries a roller 100. Arranged in the path of the roller is a cam arm 101 and when this roller engages this cam arm, the roller will be moved pivotally.

It will thus be seen that as the door 10 moves to a closed position, the shoulder 96 will engage thearm 89, and the door 13 will likewise be moved to a closed position. When the door 13 reaches its closed position, the latch 91 will engage the keeper 92 so that the door 13 will be locked.

lhen the switch 54 is closed to open they elevator door, at the beginning of opening movement, the shoulder 97 will engage the arm 98 and will move this arm against the action of the spring 93 so as to lift the latch 91 from engagement with the keeper 92. This is due to the fact that the shoulder 97 is of greater length than the shoulder'96, as contact of the roller 100 with the cam arm 101 has disengaged this shoulder 96 from the arm 8,9. Continued movement of the carriage will cause the arm 98 to engage the bracket 89 so that the door 13 will be opened simultaneously with the opening of thedoor 10. V

TWhen the doors are in closed position, the' latch 91 will engage an arm 10i)J which forms a part of a switchi103, suitably connected in the circuit of the motor M. The switch 103 is open when the doors are open and prevents operation of the motor M until the dcors'are closed. rEhe switch 103 represents the usual door switch for accomplishing the purpose stated, but is controlled by the latch 91. f

` When the elevator' door is at a closed position, the roller 100 carried by the arm 95 is in engagement with the cam arm 101 and consequently the lower portion .of the arm 95 door comprising a motor carried by the elevat-or anclin open circuit with a source ot electric supply, a transmission device connected with-,the motor, a track rail leading from the transmission device, a carriage movable lupon the track rail andk carrying the elevator door, meansoperatively connectring the transmission device with the carriage,

switches located at the ends of the path of movement of the carriage and including terminals electrically connected with the motor and terminals electrically connected with a source of electric supply and circuit closers engageable with said terminals, arms gage the circuit closers and. move them to .open positions when the carriage arrives at the ends ot its ,path ot movement and means for reversing the flow of current to the motor.

2. An operating mechanism for an elevator door rcomprising a motor carried by the elevator and in open circuit with a source of electric supply, a transmission device connected with the motor, a friction clutch interposed between the motor and transmission device, a track rail leading from the transmission device, a carriage movable upon the track rail and carrying they elevator door means operatively connecting the transmission device with the carriage, switches lc- 1 cated at the ends of the path of movement ot the carriage and including terminals electrically connected with the motorand terminals electrically connectedwith a source of electric supply and circuit closers engageable with said terminals, and arms carried by the carriage and adapted to Vengage the circuit I closers and move them to open positions when the carriage arrives at the ends oit its path of movement. l Y

- 3. An operating mechanism for anelevator door comprising a motor' carried b-y the elevator and in Vopen circuit with a source of electric supply, a transmission device connected with the motor, va brake for Ythe transmission device and connected in said i electric circuit, a track rail leading trom the transmission device, a carriageV movable upon the track rail and carrying the elevator door, means operatively connecting' the transmission device with the carriage, switches located at the ends of the path of ymovement oi' the carriage and in' cluding terminals electrically connected with the motor and terminals electrically connected with a source of electric supply and circuit closers engageable with said termi nals, and arms carried by the carriage and adapted to engage the circuit closers and move them to open positions when the car-- riage arrives at the ends of its path of move` n ment. l

4. An operating mechanism for an elevator door and elevator shaft doors comprising a motor carried by the elevator and in open circuit withia source of electric supply, a transmission device connected with the motor, .a track rail leading from the transmission device, a carriage movable upon the track:

rail and carrying they elevator door, means operatively connecting the transmission device with the carriage, switches located at the ends voit the path of movementv of the carriage and including terminals electrically connectedv with. the motor and terminals electrically connected with a source of electric supply, and circuit closers engagea-ble with said arms, arms carried by the carriage and adapted to engage the Vcircuit closers and move Vthem to carried by the carriage and adapted to enopen positions when the carriage arrives at the ends of its path of movement, latch memY rbers pivoted upon the shaft doors, keeper plates adapted to be engaged by said latch members, switch members pivoted adjacent -said keeper plates and adapted to be enfrom@ the transmission device, a carriage movable upon the track rail and carrying the elevator door, guide members upon which the carriage is slidably mounted, means operatively connecting the transmission device with the carriage, switches located at ture. i i CHARLES W. HORTON.

'electric supply, a transmission device connected with the motor, atrack rail leading` 

